sort by Rank | Alpha
| Possible Meanings | Rank |
| National Association for Sport and Physical | ****** |
| National Aeronautics and Space | *** |
| Network Application Service Provider | *** |
| National Aero Space Plane | *** |
| National Archery in the Schools Program | *** |
| National Association of Staredown Professionals | *** |
| Naval Air Station Pensacola | *** |
| National Air and Space | *** |
| Nuclear Autoantigenic Sperm Protein | *** |
| National Archery in Schools Program | *** |
| National Association of Subrogation Professionals | *** |
| National Application Service Providers | *** |
| National Association of Settlement Purchasers | *** |
| National Association of School Psychology | *** |
| National Administrative Studies Project | *** |
| Native American Student Programs | ** |
| News Application Service Provider | ** |
| Network Application Services Platform | ** |
| North American Silly Party | ** |
| National Achievement Scholarship Program | ** |
| Nashville Association of Sales Professionals | ** |
| Non Anticoagulant Sulfated Polysaccharides | ** |
| Network Administration and Security Professional | ** |
| National Assoc of School Psychologists | ** |
| National Association of Security Personnel | ** |
| National AIDS STD Programme | ** |
| Native American Support Program | ** |
| Neighbourhood Area Structure Plans | ** |
| North American Society of Phlebology | ** |
| National Archery in School Program | ** |
| National Association for School Psychology | ** |
| North American Society of Pacing | ** |
| Nebraska Association of School Psychologists | * |
| North American Sterilization Packaging | * |
| National Association of School Principals | * |
| National Associaton of School Psychologists | * |
| New Agent Success Plan | * |
| North Atlantic Seaboard Programme | * |
| National Association of School Programs | * |